{"data":{"id":"us/30-cfr-250.514","jurisdiction":"us","citation":"30 CFR 250.514","heading":"Well-control fluids, equipment, and operations.","body":"(a) Well-control fluids, equipment, and operations shall be designed, utilized, maintained, and/or tested as necessary to control the well in foreseeable conditions and circumstances, including subfreezing conditions. The well shall be continuously monitored during well-completion operations and shall not be left unattended at any time unless the well is shut in and secured.\n(b) The following well-control-fluid equipment shall be installed, maintained, and utilized:\n(1) A fill-up line above the uppermost BOP;\n(2) A well-control, fluid-volume measuring device for determining fluid volumes when filling the hole on trips; and\n(3) A recording mud-pit-level indicator to determine mud-pit-volume gains and losses. This indicator shall include both a visual and an audible warning device.\n(c) When coming out of the hole with drill pipe, the annulus shall be filled with well-control fluid before the change in such fluid level decreases the hydrostatic pressure 75 pounds per square inch (psi) or every five stands of drill pipe, whichever gives a lower decrease in hydrostatic pressure. The number of stands of drill pipe and drill collars that may be pulled prior to filling the hole and the equivalent well-control fluid volume shall be calculated and posted near the operator's station. A mechanical, volumetric, or electronic device for measuring the amount of well-control fluid required to fill the hole shall be utilized.","path":["Title 30—Mineral Resources","CHAPTER II—BUREAU OF SAFETY AND ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR","SUBCHAPTER B—OFFSHORE","PART 250—OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF","Subpart E—Oil and Gas Well-Completion Operations"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-30.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:24Z","sha256":"6929144602541110b28ff01e98d09a266eb9fc3136b4236fa442d944124b1e57","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-250.513","next":"us/30-cfr-250.515-250.517"},"notice":"GroundRules: Original legal text. Not legal advice."}